Large allocations in EJBContextImpl#isCallerInRole -------------------------------------------------- Key: WFLY-12836 URL: https://issues.jboss.org/browse/WFLY-12836 Project: WildFly Issue Type: Bug Components: EJB, Security Affects Versions: 18.0.1.Final Reporter: Philippe Marschall Assignee: Cheng Fang Priority: Major Attachments: elytron_allocations_redacted.PNG In our application we have the need to know the roles of the current user. We would like to do this using Java / Jakarta EE APIs rather than rely on WildFly implementation classes. We do this by iterating over all roles, which we know statically, and calling {{EJBContext#isCallerInRole}} for each one. This seem to be a common technique, see [How to get user roles in a JSP / Servlet|https://stackoverflow.com/questions/344117/how-to-get-user-roles-...]. That's about 100 roles for us. We were expecting that would be a lookup into a {{HashMap}} or similar with O(1) complexity and almost no allocations. This however does not seem to be case as {{EJBContextImpl#isCallerInRole}} seems to do the role mapping for every call. This results in a large amount of allocations. In our case this completely dominates our allocation profile. See attached screenshot from JFR.